Improvement in permutation-locks



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or CINCINNATI, onto,

Letters Patent hNo. 108,481, dated October 18, 1870.

IMPROVEMENT |N PERMUTATlON-LOCKS.

.lhe Schedule referred to in these Letters Patent and making part of the same. -K 5 K ing part of this specification, in which- Figure 1 is a perspective view, with the permutation-wheels removed, and the sleeved disk Gr drawn out from the arbor AY Figure 2 is a plan of the reverse side of a permutation-wheel.

Figure-3 is a section, through the line u; af, in fig. 2.

Figure 4 isa plan of front of same, showing cam c on its face.

Figure 5 is a plan of reverse side of same, with cap J" and screw J' removed, so as to show pinion J'.-

Figure 6 is a view of the keyed washers which separate the permutation-wheels.

Figure 7 is a perspective View, locked.

Figure 8 is a lfront elevation, unlocked, and the sleeved disk G removed.

Figure 9 is a view of a part, detached.A

The objects of my improvements are- First, irrea-ter security against burglars; and

Second, greater simplicity and consequent economy.

Similar letters refer to similar parts throughout the drawing. p

A is a spindle, attached to the knob or handle, and passing through the lock.

E is a sleeve, rigidly fastened at the outer end to lthc lock-case.

The spindle turns easily inside this sleeve, and at its inner'end is,v amale screw, which works in a `female screw inside the sleeve L, and over which the disk G is rigidly attached.

"lhe inner end of thc screw is flattened on one side, as shown in fig. 1.

'lhc carrying-dog H, which may be ot' any convenient shape, lits neatly over this part o' the spindie, and has a pinpassing through it, riveted on thc outside, and which fits in an appropriate recess in the face ot the disk G, lfig. 7.

rllhis, together with the nut M, which is screwed on the spindle A, and binds the cariyingdog to itsV place, prevents the screw from working when it is desired to operate the lock by the spindle C C 0 are the permutation-wheels, which. work loosely over the sleeve E, through which the spindle runs.

They have the usual connecting-pins or projections upon their faces for the purpose of moving each other.

The disk G has also such apio, which interlocks with a similar one upon thc face of the wheel contiguous to it. l

This pin-in the disk G is shown yin the drawing; the similar ones in the wheels are not shown.

A longitudinal groove is made inthe sleeve E,

shown in fig. 1.

Metallic washers, each ,havingl a projection tting neatly in this groove, are placed around the said sleeve, `one between each two of the permutationwheels.

These wheels each have a wheel, J, and-pinion, J', iig. 5', for the purpose of changingthe combination of the lock.

,Both wheel J and pinion J sit in recesses respect-- ively provided for tl1em,'and in which they turn easily. A

The pinions are secured in then' places bvpclamps changingr the combination, tits, clearly shown in.

fic. 2.

The cog-wheels J sit neatly in their places without being otherwise fastened.

The connecting-pins, by which the wheels operate each other, are. attached to the cog-wheels, so

that they may be revolved without moving the remaining parts of the combination-wheels, when the screw-bolt J is loosened, as afterward explained.

When thc screw-bolt J" is tightened, the cog wheels'and pinions do not move separately.

There is a cam upon the face of each permutation-wheel, whose diameter is one-fourth ptan inch less than that of the wheel, and placed one-eighth of an inch eccentric to the periphery of the wheel.

D l) l) are yokes suspended upon square pins, D D', projecting from thc lock-case, with tubular washers, K, between them, in the manner clearly shown in 1.

rlhe distance of the arms ol the yoke from each other is equal to the diameter of the cams.

1)' are arms upon the yokes D, which sustain the projecting pin B', which is permanently attached to the rear or weighted end of the bolt B.

Other similar' shaped arms are shown upon the other ends of the yokes, but their only Objectis symmetry.

rlhe holes 'S in the arms' of the yokes, through which the square pins pass, are' slotted laterally, so as to permit as much play as the eccentricity of the cams may require.

The upper edges of the arms D' are made a scin- G' presented to the tlla too low to support oreome in contact with'the pin B', except'wheu the pin Fffalls into the notch (1I Y t When locked, the periphery oi' the disk G, by contact with the piel", always sustains the bolt at such a position that the pin B' is just above the arms D', except when the pin F is above or in the notch G'. l

And, in order that the pin F', in its fall, may be as noiseless'as possible, the edge of the disk G is chamfered slightly for a very small distance on each vside ofthe notch When the arms D' are withdrawn and vthe notch pin l1", the' bolt falls by its own gravity.

`The bolt'lplays loosely on thesleeve E. It is Y formed so as not to interfere, throughout its range of motion, with the square pins D"D"'. It receives its motion, through the link F, from the disk G, by means of the catch F', which interlocks in the slot G' of the disk G, and of the cogs on the rear arm of the link, which gear int-o the cogs ou the bolt.

B" is a stop which limits't-he downward fall bolt B. t

The knob, not shown in the drawing, has the oi'l the usual dial, and correspondingly-fixed mark on'thc stationary ring s'urroundingthe dial, for' the purpose of indicating the location of the permntation-wheeis.

The operation is as follows:

, Assuming it tobe locked, and it bc desired to open it, the knob is turned as many full revolutions to the left as there are combination\\heels, and so much of an additional revolution as will bring the first mnnA ber, on which the lock is set, on the dial opposite the mark provided on t-he stationary ring; the knob is then turned to the right as many full revolutions,

dess one, as there are combination-wheels, and so much of an additional revolution as will bring theV second number ou which the lock. is set on the dial opposite the mark ou the stationary ring; the knob is then turned to the left as many full revolutions, less two, as there are combination-wheels, and so much of au additional revolution as will bringthe4 thirdnumber, on which the lock is set, on the dial,

opposite the mark on the stationary ring.

-.The first operation above described has set the wheel nearest the bolt, the second has set the wheel second from the holt, and the third has set the wheel third from the bolt.

If there be only three wheels the lock is now set, and it may be opened by turning the knob slowly to the right until .the notch G' of the disk G is immediately under the pin F of the link 14, when the pin` wiliall'into the notch, the rear end of the bolt, which is for that purpose weighted, falling by its own gravity.; the previously-described operations having separately withdrawn,by the operations of the cams C', the arms D', from underneath the projecting pin B'.

The combination cannot be disarranged when the bolt is withdrawn.

l To disarrange when locked, turn the knob three or more times to the left.

To change the combination, select a number on the dial for every combination-wheel.

Assuming that there are three wheels, and it is desired to set the lock to any three given numbers, arrange the wheels upon the combination previously set; then insert the key Q into the appropriate hole in the boltJ, inside ofthe lock, until the little stump,

which is not new and not shown in the drawing, Ahas entirely enteredthe clutch of the key; turn the key a quarter circle to the left,wi1ichwil1 loosenthe pinion J', and permit wheel-and pinion to revblve t0- gether.l

If the knob be uow'turned, the Vconnecting-pins or projections by which vthe permutation-wheels' move each otherbeing'npon' the wheels J, and the pinions J free torevolve, ythe wheels J will revolve, While the cams C', and all the portions of the permutationmain stationary.

1f, now, the process 4previously described for openwhecls C, to which they are rigidly attached, will-reing thc lock bc gone lthrough, varied only by stopping l during the additional revolutions at the newly-selected numbers, the combination will be `changed, as desired, but as soon as thelast wheel of the combination is set, and before attempting to move the bolt, t'

the pinion J must he tightened, and the key Q, withdrawn.

vD', and arranged to movelaterally ou pins D" D', 1n

combination with'the projecting pin B' 'and bolt B. J. C. HINTZ, JR. Witnesses:

WM. H. S1LL1T0 S. S. M oRnIs.

t 1' v l 

